A couple of small tweaks. (#4569)

* Stop ignoring the safe area with the suggestions view.

They weren't visible on iPad (hidden behind the sidebar) and I can't find any instance when they're shown where the safe area comes into play.

* Make sure the room list deselects the cell when dismissed a room.

* Use the backports pattern in more places.

* Fix the annoying header on macOS.

* Silence some warnings

* Fix compound CI branch name.

ElementX/Sources/Other/SwiftUI/Animation/ZoomTransition.swift

@@ -1,30 +0,0 @@
-//
-// Copyright 2024 New Vector Ltd.
-//
-// SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial
-// Please see LICENSE files in the repository root for full details.
-//
-
-import SwiftUI
-
-extension View {
-    /// A convenience modifier to conditionally apply `.navigationTransition(.zoom(…))` when available.
-    @ViewBuilder
-    func zoomTransition(sourceID: some Hashable, in namespace: Namespace.ID) -> some View {
-        if #available(iOS 18.0, *) {
-            navigationTransition(.zoom(sourceID: sourceID, in: namespace))
-        } else {
-            self
-        }
-    }
-    
-    /// A convenience modifier to conditionally apply `.matchedTransitionSource(…)` when available.
-    @ViewBuilder
-    func zoomTransitionSource(id: some Hashable, in namespace: Namespace.ID) -> some View {
-        if #available(iOS 18.0, *) {
-            matchedTransitionSource(id: id, in: namespace)
-        } else {
-            self
-        }
-    }
-}